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Modem is resetting

Regular Contributor

Modem is resetting

This occurs about once a day. Today it happened twice within a 10 minute perioud.

 

I'll be online working or whatever, and suddenly my internet stops working. Turn around and the modem is resetting. I don't know if this is due to something comcast is doing or something with the modem itself. I did not have this problem with the previous cable provider. 

 

The signal info on the modem looks good.

 

Here's what's displayed on the modems log:

 

 

an 01 1970 00:00:18 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=00:23:74:f2:a2:f0;CMTS-MAC=00:01:5c:33:1f:d0;CM-QOS=1.1;CM-VER=3.0; Jan 01 1970 00:00:12 6-Notice   Cable Modem Reboot due to T4 timeout ;CM-MAC=00:23:74:f2:a2:f0;CMTS-MAC=00:01:5c:33:1f:d0;CM-QOS=1.1;CM-VER=3.0; Dec 28 2011 15:07:58 3-Critical R06.0 Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=00:23:74:f2:a2:f0;CMTS-MAC=00:01:5c:33:1f:d0;CM-QOS=1.1;CM-VER=3.0; Dec 28 2011 15:07:58 3-Critical R03.0 Ranging Request Retries exhausted;CM-MAC=00:23:74:f2:a2:f0;CMTS-MAC=00:01:5c:33:1f:d0;CM-QOS=1.1;CM-VER=3.0; Dec 28 2011 15:07:57 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=00:23:74:f2:a2:f0;CMTS-MAC=00:01:5c:33:1f:d0;CM-QOS=1.1;CM-VER=3.0; Jan 01 1970 00:00:12 6-Notice   Cable Modem Reboot due to T4 timeout ;CM-MAC=00:23:74:f2:a2:f0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0; Dec 28 2011 15:00:27 3-Critical R06.0 Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=00:23:74:f2:a2:f0;CMTS-MAC=00:01:5c:33:1f:d0;CM-QOS=1.1;CM-VER=3.0; Dec 28 2011 15:00:27 3-Critical R03.0 Ranging Request Retries exhausted;CM-MAC=00:23:74:f2:a2:f0;CMTS-MAC=00:01:5c:33:1f:d0;CM-QOS=1.1;CM-VER=3.0; Dec 28 2011 15:00:26 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=00:23:74:f2:a2:f0;CMTS-MAC=00:01:5c:33:1f:d0;CM-QOS=1.1;CM-VER=3.0; Jan 01 1970 00:00:12 6-Notice   Cable Modem Reboot due to T4 timeout ;CM-MAC=00:23:74:f2:a2:f0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0; Dec 27 2011 16:24:53 3-Critical R06.0 Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=00:23:74:f2:a2:f0;CMTS-MAC=00:01:5c:33:1f:d0;CM-QOS=1.1;CM-VER=3.0; Dec 27 2011 16:24:53 3-Critical R03.0 Ranging Request Retries exhausted;CM-MAC=00:23:74:f2:a2:f0;CMTS-MAC=00:01:5c:33:1f:d0;CM-QOS=1.1;CM-VER=3.0; Dec 27 2011 16:24:51 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=00:23:74:f2:a2:f0;CMTS-MAC=00:01:5c:33:1f:d0;CM-QOS=1.1;CM-VER=3.0; Jan 01 1970 00:00:12 6-Notice   Cable Modem Reboot due to T4 timeout ;CM-MAC=00:23:74:f2:a2:f0;CMTS-MAC=00:00:00:00:00:00;CM-QOS=1.1;CM-VER=3.0; Dec 27 2011 15:55:43 3-Critical R06.0 Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=00:23:74:f2:a2:f0;CMTS-MAC=00:01:5c:33:1f:d0;CM-QOS=1.1;CM-VER=3.0; Dec 27 2011 15:55:43 3-Critical R03.0 Ranging Request Retries exhausted;CM-MAC=00:23:74:f2:a2:f0;CMTS-MAC=00:01:5c:33:1f:d0;CM-QOS=1.1;CM-VER=3.0; Dec 27 2011 15:55:42 3-Critical R02.0 No Ranging Response received - T3 time-out;CM-MAC=00:23:74:f2:a2:f0;CMTS-MAC=00:01:5c:33:1f:d0;CM-QOS=1.1;CM-VER=3.0; Jan 01 1970 00:00:12 6-Notice   Cable Modem Reboot due to T4 timeout ;CM-MAC=00:23:74:f2:a2:f0;CMTS-MAC=00:01:5c:33:1f:d0;CM-QOS=1.1;CM-VER=3.0; Dec 27 2011 13:54:09 3-Critical R06.0 Unicast Maintenance Ranging attempted - No response - Retries exhausted;CM-MAC=00:23:74:f2:a2:f0;CMTS-MAC=00:01:5c:33:1f:d0;CM-QOS=1.1;CM-VER=3.0; Dec 27 2011 13:54:09 3-Critical R03.0 Ranging Request Retries exhausted;CM-MAC=00:23:74:f2:a2:f0;CMTS-MAC=00:01:5c:33:1f:d0;CM-QOS=1.1;CM-VER=3.0;

 

Any ideas as to why this is happening?

 

Thanks

 

P.S. sorry about the formatting of the log info - the forum keeps removing all the formatting

 

Connection Expert

Re: Modem is resetting


merkk wrote:

The signal info on the modem looks good.

 


Can we see them please ?




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Regular Contributor

Re: Modem is resetting

rather then copy and paste which looses all the formatting, i saved the page as an image which you can see here: http://imgur.com/a/mxqG1

 

Let me know if you need any additional info.

 

thanks

Connection Expert

Re: Modem is resetting

The stats as read at the modem level at that moment in time were o/k. No "smoking gun" there, sorry.  But there are two additional signal stats which can't be read at the modem level. They can only be read from their end by them polling the CMTS (Cable Modem Termination System) at the local headend facility.

They are the 'Upstream Receive Power Level' and the 'Upstream uSNR' (upstream Signal To Noise Ratio). Both of these are as equally important in diagnosing connectivity issues as are the modem's stats.

You can call in and ask what these figures are. The Upstream Receive Power Level should fall within the range of -10dB to +10dB with 0dB being in the middle and perfect.

The Upstream SNR should be least 30dB, and the higher it is the better. You could have a noise ingress issue in the upstream channel.




Community Icon
I am not a Comcast employee, I am a paying customer just like you!
I am an XFINITY Forum Expert and I am here to help. For information on the program click here.
We ask that you post publicly so people with similar questions may benefit from the conversation.
Was your question answered? Mark it as an accepted solution!solution Icon
Community Icon
I am not a Comcast employee. I am a paying customer just like you!
I am an XFINITY Forum Expert and I am here to help.
We ask that you post publicly so people with similar questions may benefit.
Was your question answered? Mark it as an accepted solution!solution Icon
Community Icon
I am not a Comcast employee.

Was your question answered?
Mark it as a solution!solution Icon